Photocurable resin composition and resin composition for plastics comprising the same

Abstract

A photocurable resin composition comprises a cationic polymerizable compound (A), an acrylic resin (B) and a cationic photopolymerization initiator (C), in which the acrylic resin (B) has a cationic polymerizable functional group, and the content of the component (A) is 30 to 95 parts by mass and the content of the component (B) is 5 to 70 parts by mass, based on 100 parts by mass of the total amount of the components (A) and (B). In addition, the functional group of the acrylic resin (B) preferably contains at least one of a cyclic ether group, a vinyloxy group, an acid adduct of a vinyloxy group, and an active hydrogen group, with the active hydrogen group preferably being a hydroxyl group. The photocurable resin composition has sufficient curability and sufficient adhesiveness to rigid plastics such as polycarbonate and PET having poor adhesive property.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a photocurable resin composition for paints, adhesives, ink or the like, which is cured by light irradiation, and in particular, for rigid plastics such as polycarbonate, PET, and ABS resins having poor adhesive property. [0002] 2. Description of the Related Art [0003] In resent years, plastic materials have been used widely in the field of electronic information materials. For example, polycarbonate, which is a rigid plastic, has been used frequently as a material for a cellular phone or an optical disk. Similarly, a PET resin has been used as a material for an optical film, and an ABS resin has been used as a material for the housing of home information appliances. In the processes for their productization, there are processes of adhering, coating, and printing by photocuring such rigid plastics. However, these materials have poor adhesive property. Meanwhile, the materials for paints, ad...

AI Technical Summary

Benefits of technology

[0008] Specifically, an advantage of the invention is that it provides a photocurable resin composition comprising a cationic polymerizable compound (A), an acrylic resin (B), a cationic photopolymerization initiator (C), wherein the acrylic resin (B) has a cationic polymerizable functional group, and the content of the component (A) is 30 to 95 parts by mass and the content of the component (B) is 5 to 70 parts by mass, based on 100 parts by mass of the total amount of the components (A) and (B).

Problems solved by technology

However, these materials have poor adhesive property.

However, the curing system using cationic ring-opening photopolymerization had difficulties in incorporating a functional group capable of interacting with rigid plastics to be adhered, thus the adhesive property was not given sufficiently.

However, since this system contains basic materials which may act as a retarder (reaction inhibitor) in cationic ring-opening photopolymerization reaction, it has a drawback in that a sufficient curing rate, necessary for productivity, is not exhibited.

Images